14. f4g5 [%c_effect g5;square;g5;type;GreatFind;persistent;true][%c_highlight d8;keyPressed;none;opacity;0.8;square;d8;persistent;false,g5;keyPressed;none;opacity;0.8;square;g5;persistent;false] An excellent move to disrupt Black's harmonious development. 14... d8b6  15. d1c1  15... d7e5 A new move. 16. h2h3 